1. Unit 1 Network Speed Learning Objectives: 5.1.3 Understand the network media 5.1.4 Understand that network data speeds are measured in bits per second

2. Network Media Copper Cable There are three main types of network media that are used to connect computers together in a network. Now complete slide 8 of your Networks workbook. Fibre Optic CableWireless

3. Transmission Speed Data transmission speeds are measured in bits per second (bps). Now complete slide 9 of your Networks workbook. Data storage is measured in bytes (1 byte = 8 bits). Time = size of file (bits) / network speed (bits) We use this formula to calculate how long it will take to transfer a file.

4. Example In this example we are going to calculate how long it would take to transmit a 5 KB file over a network with a speed of 10 Mbps. Now complete slides 10 and 11 of your Networks workbook. Step 1: convert the file size to bits 5 KB = 5 x 8 x 1024 Step 2: convert the speed to bps 10 Mbps = 10 x 1,000,000 Step 3: calculate the time Time = file size / speed

5. Challenge Develop a Python programme that takes a file size in KB and a network speed in Mbps and outputs the time it would take to transfer the file.